17886b3022
* gnu/system/vm.scm (qemu-image): Change the store's mode to #o1775.
Support 'populate' clauses that specify a UID and GID.
(system-qemu-image): Make sure /nix/store has owner 'root' and group
'guixbuild'. Set the right owner for /home/guest. Create
/var/nix/profiles/per-user/{root,guest}.
629 lines
28 KiB
Scheme
629 lines
28 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
|
||
;;;
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||
;;; This file is part of GNU Guix.
|
||
;;;
|
||
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
||
;;; under the terms of the GNU General Public License as published by
|
||
;;; the Free Software Foundation; either version 3 of the License, or (at
|
||
;;; your option) any later version.
|
||
;;;
|
||
;;; GNU Guix is distributed in the hope that it will be useful, but
|
||
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
;;; GNU General Public License for more details.
|
||
;;;
|
||
;;; You should have received a copy of the GNU General Public License
|
||
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (gnu system vm)
|
||
#:use-module (guix config)
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||
#:use-module (guix store)
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||
#:use-module (guix derivations)
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||
#:use-module (guix packages)
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||
#:use-module ((gnu packages base) #:select (%final-inputs
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||
guile-final
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||
gcc-final
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||
glibc-final
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||
coreutils))
|
||
#:use-module (gnu packages guile)
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||
#:use-module (gnu packages bash)
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||
#:use-module (gnu packages qemu)
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||
#:use-module (gnu packages parted)
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||
#:use-module (gnu packages grub)
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||
#:use-module (gnu packages linux)
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||
#:use-module (gnu packages linux-initrd)
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||
#:use-module (gnu packages package-management)
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||
#:use-module ((gnu packages make-bootstrap)
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||
#:select (%guile-static-stripped))
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||
#:use-module (gnu packages system)
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||
|
||
#:use-module (gnu system shadow)
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||
#:use-module (gnu system linux)
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||
#:use-module (gnu system grub)
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||
#:use-module (gnu system dmd)
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||
|
||
#:use-module (srfi srfi-1)
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||
#:use-module (srfi srfi-26)
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||
#:use-module (ice-9 match)
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||
|
||
#:export (expression->derivation-in-linux-vm
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||
qemu-image
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||
system-qemu-image))
|
||
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; Tools to evaluate build expressions within virtual machines.
|
||
;;;
|
||
;;; Code:
|
||
|
||
(define* (expression->derivation-in-linux-vm store name exp
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||
#:key
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||
(system (%current-system))
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||
(inputs '())
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||
(linux linux-libre)
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||
(initrd qemu-initrd)
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||
(qemu qemu/smb-shares)
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||
(env-vars '())
|
||
(modules '())
|
||
(guile-for-build
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||
(%guile-for-build))
|
||
|
||
(make-disk-image? #f)
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||
(references-graphs #f)
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||
(disk-image-size
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||
(* 100 (expt 2 20))))
|
||
"Evaluate EXP in a QEMU virtual machine running LINUX with INITRD. In the
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virtual machine, EXP has access to all of INPUTS from the store; it should put
|
||
its output files in the `/xchg' directory, which is copied to the derivation's
|
||
output when the VM terminates.
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||
|
||
When MAKE-DISK-IMAGE? is true, then create a QEMU disk image of
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DISK-IMAGE-SIZE bytes and return it.
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||
|
||
When REFERENCES-GRAPHS is true, it must be a list of file name/store path
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||
pairs, as for `derivation'. The files containing the reference graphs are
|
||
made available under the /xchg CIFS share."
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||
;; FIXME: Allow use of macros from other modules, as done in
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;; `build-expression->derivation'.
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||
|
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(define input-alist
|
||
(map (match-lambda
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||
((input (? package? package))
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`(,input . ,(package-output store package "out" system)))
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((input (? package? package) sub-drv)
|
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`(,input . ,(package-output store package sub-drv system)))
|
||
((input (? derivation? drv))
|
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`(,input . ,(derivation->output-path drv)))
|
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((input (? derivation? drv) sub-drv)
|
||
`(,input . ,(derivation->output-path drv sub-drv)))
|
||
((input (and (? string?) (? store-path?) file))
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||
`(,input . ,file)))
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||
inputs))
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||
|
||
(define exp*
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||
;; EXP, but with INPUTS available.
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`(let ((%build-inputs ',input-alist))
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,exp))
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||
|
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(define builder
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||
;; Code that launches the VM that evaluates EXP.
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||
`(let ()
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(use-modules (guix build utils)
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(srfi srfi-1)
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(ice-9 rdelim))
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||
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(let ((out (assoc-ref %outputs "out"))
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(cu (string-append (assoc-ref %build-inputs "coreutils")
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"/bin"))
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(qemu (string-append (assoc-ref %build-inputs "qemu")
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"/bin/qemu-system-"
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(car (string-split ,system #\-))))
|
||
(img (string-append (assoc-ref %build-inputs "qemu")
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"/bin/qemu-img"))
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||
(linux (string-append (assoc-ref %build-inputs "linux")
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"/bzImage"))
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||
(initrd (string-append (assoc-ref %build-inputs "initrd")
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||
"/initrd"))
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(builder (assoc-ref %build-inputs "builder")))
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||
|
||
;; XXX: QEMU uses "rm -rf" when it's done to remove the temporary SMB
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;; directory, so it really needs `rm' in $PATH.
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(setenv "PATH" cu)
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||
|
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,(if make-disk-image?
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`(zero? (system* img "create" "image.qcow2"
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,(number->string disk-image-size)))
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'(begin))
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(mkdir "xchg")
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||
|
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;; Copy the reference-graph files under xchg/ so EXP can access it.
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(begin
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,@(match references-graphs
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(((graph-files . _) ...)
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(map (lambda (file)
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`(copy-file ,file
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,(string-append "xchg/" file)))
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graph-files))
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(#f '())))
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|
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(and (zero?
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(system* qemu "-nographic" "-no-reboot"
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"-net" "nic,model=e1000"
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"-net" (string-append "user,smb=" (getcwd))
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"-kernel" linux
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"-initrd" initrd
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"-append" (string-append "console=ttyS0 --load="
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builder)
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,@(if make-disk-image?
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'("-hda" "image.qcow2")
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'())))
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,(if make-disk-image?
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'(copy-file "image.qcow2" ; XXX: who mkdir'd OUT?
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out)
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'(begin
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(mkdir out)
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(copy-recursively "xchg" out)))))))
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(let ((user-builder (add-text-to-store store "builder-in-linux-vm"
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(object->string exp*)
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'()))
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(->drv (cut package-derivation store <> system))
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(coreutils (car (assoc-ref %final-inputs "coreutils"))))
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(build-expression->derivation store name system builder
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`(("qemu" ,(->drv qemu))
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("linux" ,(->drv linux))
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("initrd" ,(->drv initrd))
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("coreutils" ,(->drv coreutils))
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("builder" ,user-builder)
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,@(map (match-lambda
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((name (? package? package)
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sub-drv ...)
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`(,name ,(->drv package)
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,@sub-drv))
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((name (? string? file))
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`(,name ,file))
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(tuple tuple))
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inputs))
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#:env-vars env-vars
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#:modules (delete-duplicates
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`((guix build utils)
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,@modules))
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#:guile-for-build guile-for-build
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#:references-graphs references-graphs)))
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(define* (qemu-image store #:key
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(name "qemu-image")
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(system (%current-system))
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(disk-image-size (* 100 (expt 2 20)))
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grub-configuration
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(initialize-store? #f)
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(populate #f)
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(inputs '())
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(inputs-to-copy '()))
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"Return a bootable, stand-alone QEMU image. The returned image is a full
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disk image, with a GRUB installation that uses GRUB-CONFIGURATION as its
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configuration file.
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INPUTS-TO-COPY is a list of inputs (as for packages) whose closure is copied
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into the image being built. When INITIALIZE-STORE? is true, initialize the
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store database in the image so that Guix can be used in the image.
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POPULATE is a list of directives stating directories or symlinks to be created
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in the disk image partition. It is evaluated once the image has been
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populated with INPUTS-TO-COPY. It can be used to provide additional files,
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such as /etc files."
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(define input->name+derivation
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(match-lambda
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((name (? package? package))
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`(,name . ,(derivation->output-path
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(package-derivation store package system))))
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((name (? package? package) sub-drv)
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`(,name . ,(derivation->output-path
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(package-derivation store package system)
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sub-drv)))
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((name (? derivation? drv))
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`(,name . ,(derivation->output-path drv)))
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((name (? derivation? drv) sub-drv)
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`(,name . ,(derivation->output-path drv sub-drv)))
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((input (and (? string?) (? store-path?) file))
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`(,input . ,file))))
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(expression->derivation-in-linux-vm
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store "qemu-image"
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`(let ()
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(use-modules (ice-9 rdelim)
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(srfi srfi-1)
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(guix build utils)
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(guix build linux-initrd))
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(let ((parted (string-append (assoc-ref %build-inputs "parted")
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"/sbin/parted"))
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(mkfs (string-append (assoc-ref %build-inputs "e2fsprogs")
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"/sbin/mkfs.ext3"))
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(grub (string-append (assoc-ref %build-inputs "grub")
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"/sbin/grub-install"))
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(umount (string-append (assoc-ref %build-inputs "util-linux")
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"/bin/umount")) ; XXX: add to Guile
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(grub.cfg (assoc-ref %build-inputs "grub.cfg")))
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(define (read-reference-graph port)
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;; Return a list of store paths from the reference graph at PORT.
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;; The data at PORT is the format produced by #:references-graphs.
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(let loop ((line (read-line port))
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(result '()))
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(cond ((eof-object? line)
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(delete-duplicates result))
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((string-prefix? "/" line)
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(loop (read-line port)
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(cons line result)))
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(else
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(loop (read-line port)
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result)))))
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(define (things-to-copy)
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;; Return the list of store files to copy to the image.
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(define (graph-from-file file)
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(call-with-input-file file
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read-reference-graph))
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,(match inputs-to-copy
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(((graph-files . _) ...)
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`(let* ((graph-files ',(map (cut string-append "/xchg/" <>)
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graph-files))
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(paths (append-map graph-from-file graph-files)))
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(delete-duplicates paths)))
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(#f ''())))
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|
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;; GRUB is full of shell scripts.
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(setenv "PATH"
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(string-append (dirname grub) ":"
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(assoc-ref %build-inputs "coreutils") "/bin:"
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(assoc-ref %build-inputs "findutils") "/bin:"
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(assoc-ref %build-inputs "sed") "/bin:"
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(assoc-ref %build-inputs "grep") "/bin:"
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(assoc-ref %build-inputs "gawk") "/bin"))
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|
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(display "creating partition table...\n")
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(and (zero? (system* parted "/dev/vda" "mklabel" "msdos"
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"mkpart" "primary" "ext2" "1MiB"
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,(format #f "~aB"
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(- disk-image-size
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(* 5 (expt 2 20))))))
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(begin
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(display "creating ext3 partition...\n")
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(and (zero? (system* mkfs "-F" "/dev/vda1"))
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(let ((store (string-append "/fs" ,%store-directory)))
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(display "mounting partition...\n")
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(mkdir "/fs")
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(mount "/dev/vda1" "/fs" "ext3")
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(mkdir-p "/fs/boot/grub")
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(symlink grub.cfg "/fs/boot/grub/grub.cfg")
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|
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;; Populate the image's store.
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(mkdir-p store)
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(chmod store #o1775)
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(for-each (lambda (thing)
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(copy-recursively thing
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(string-append "/fs"
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thing)))
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(cons grub.cfg (things-to-copy)))
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;; Populate /dev.
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(make-essential-device-nodes #:root "/fs")
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;; Optionally, register the inputs in the image's store.
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(let* ((guix (assoc-ref %build-inputs "guix"))
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(register (string-append guix
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"/sbin/guix-register")))
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,@(if initialize-store?
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(match inputs-to-copy
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(((graph-files . _) ...)
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(map (lambda (closure)
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`(system* register "--prefix" "/fs"
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,(string-append "/xchg/"
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closure)))
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graph-files)))
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'(#f)))
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|
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;; Evaluate the POPULATE directives.
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,@(let loop ((directives populate)
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(statements '()))
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(match directives
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(()
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(reverse statements))
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((('directory name) rest ...)
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(loop rest
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(cons `(mkdir-p ,(string-append "/fs" name))
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statements)))
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((('directory name uid gid) rest ...)
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(let ((dir (string-append "/fs" name)))
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(loop rest
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(cons* `(chown ,dir ,uid ,gid)
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`(mkdir-p ,dir)
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statements))))
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(((new '-> old) rest ...)
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(loop rest
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(cons `(symlink ,old
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,(string-append "/fs" new))
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statements)))))
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|
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(and=> (assoc-ref %build-inputs "populate")
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(lambda (populate)
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(chdir "/fs")
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(primitive-load populate)
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(chdir "/")))
|
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|
||
(display "clearing file timestamps...\n")
|
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(for-each (lambda (file)
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(let ((s (lstat file)))
|
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;; XXX: Guile uses libc's 'utime' function
|
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;; (not 'futime'), so the timestamp of
|
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;; symlinks cannot be changed, and there
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;; are symlinks here pointing to
|
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;; /nix/store, which is the host,
|
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;; read-only store.
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(unless (eq? (stat:type s) 'symlink)
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(utime file 0 0 0 0))))
|
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(find-files "/fs" ".*"))
|
||
|
||
(and (zero?
|
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(system* grub "--no-floppy"
|
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"--boot-directory" "/fs/boot"
|
||
"/dev/vda"))
|
||
(zero? (system* umount "/fs"))
|
||
(reboot))))))))
|
||
#:system system
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#:inputs `(("parted" ,parted)
|
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("grub" ,grub)
|
||
("e2fsprogs" ,e2fsprogs)
|
||
("grub.cfg" ,grub-configuration)
|
||
|
||
;; For shell scripts.
|
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("sed" ,(car (assoc-ref %final-inputs "sed")))
|
||
("grep" ,(car (assoc-ref %final-inputs "grep")))
|
||
("coreutils" ,(car (assoc-ref %final-inputs "coreutils")))
|
||
("findutils" ,(car (assoc-ref %final-inputs "findutils")))
|
||
("gawk" ,(car (assoc-ref %final-inputs "gawk")))
|
||
("util-linux" ,util-linux)
|
||
|
||
,@(if initialize-store?
|
||
`(("guix" ,guix-0.4))
|
||
'())
|
||
|
||
,@inputs-to-copy)
|
||
#:make-disk-image? #t
|
||
#:disk-image-size disk-image-size
|
||
#:references-graphs (map input->name+derivation inputs-to-copy)
|
||
#:modules '((guix build utils)
|
||
(guix build linux-initrd))))
|
||
|
||
|
||
;;;
|
||
;;; Stand-alone VM image.
|
||
;;;
|
||
|
||
(define* (union store inputs
|
||
#:key (guile (%guile-for-build)) (system (%current-system))
|
||
(name "union"))
|
||
"Return a derivation that builds the union of INPUTS. INPUTS is a list of
|
||
input tuples."
|
||
(define builder
|
||
`(begin
|
||
(use-modules (guix build union))
|
||
|
||
(setvbuf (current-output-port) _IOLBF)
|
||
(setvbuf (current-error-port) _IOLBF)
|
||
|
||
(let ((output (assoc-ref %outputs "out"))
|
||
(inputs (map cdr %build-inputs)))
|
||
(format #t "building union `~a' with ~a packages...~%"
|
||
output (length inputs))
|
||
(union-build output inputs))))
|
||
|
||
(build-expression->derivation store name system builder
|
||
(map (match-lambda
|
||
((name (? package? p))
|
||
`(,name ,(package-derivation store p
|
||
system)))
|
||
((name (? package? p) output)
|
||
`(,name ,(package-derivation store p
|
||
system)
|
||
,output))
|
||
(x x))
|
||
inputs)
|
||
#:modules '((guix build union))
|
||
#:guile-for-build guile))
|
||
|
||
(define (system-qemu-image store)
|
||
"Return the derivation of a QEMU image of the GNU system."
|
||
(define motd
|
||
(add-text-to-store store "motd" "
|
||
Happy birthday, GNU! http://www.gnu.org/gnu30
|
||
|
||
"))
|
||
|
||
(define %pam-services
|
||
;; Services known to PAM.
|
||
(list %pam-other-services
|
||
(unix-pam-service "login"
|
||
#:allow-empty-passwords? #t
|
||
#:motd motd)))
|
||
|
||
(define %dmd-services
|
||
;; Services run by dmd.
|
||
(list (host-name-service store "gnu")
|
||
(mingetty-service store "tty1")
|
||
(mingetty-service store "tty2")
|
||
(mingetty-service store "tty3")
|
||
(mingetty-service store "tty4")
|
||
(mingetty-service store "tty5")
|
||
(mingetty-service store "tty6")
|
||
(syslog-service store)
|
||
(guix-service store #:guix guix-0.4)
|
||
(nscd-service store)
|
||
|
||
;; QEMU networking settings.
|
||
(static-networking-service store "eth0" "10.0.2.10"
|
||
#:gateway "10.0.2.2")))
|
||
|
||
(define build-user-gid 30000)
|
||
|
||
(define build-accounts
|
||
(guix-build-accounts store 10 #:gid build-user-gid))
|
||
|
||
(define resolv.conf
|
||
;; Name resolution for default QEMU settings.
|
||
(add-text-to-store store "resolv.conf"
|
||
"nameserver 10.0.2.3\n"))
|
||
|
||
(define etc-services
|
||
(string-append (package-output store net-base) "/etc/services"))
|
||
(define etc-protocols
|
||
(string-append (package-output store net-base) "/etc/protocols"))
|
||
(define etc-rpc
|
||
(string-append (package-output store net-base) "/etc/rpc"))
|
||
|
||
(parameterize ((%guile-for-build (package-derivation store guile-final)))
|
||
(let* ((bash-drv (package-derivation store bash))
|
||
(bash-file (string-append (derivation->output-path bash-drv)
|
||
"/bin/bash"))
|
||
(dmd-drv (package-derivation store dmd))
|
||
(dmd-file (string-append (derivation->output-path dmd-drv)
|
||
"/bin/dmd"))
|
||
(dmd-conf (dmd-configuration-file store %dmd-services))
|
||
(accounts (cons* (user-account
|
||
(name "root")
|
||
(password "")
|
||
(uid 0) (gid 0)
|
||
(comment "System administrator")
|
||
(home-directory "/")
|
||
(shell bash-file))
|
||
(user-account
|
||
(name "guest")
|
||
(password "")
|
||
(uid 1000) (gid 100)
|
||
(comment "Guest of GNU")
|
||
(home-directory "/home/guest")
|
||
(shell bash-file))
|
||
build-accounts))
|
||
(passwd (passwd-file store accounts))
|
||
(shadow (passwd-file store accounts #:shadow? #t))
|
||
(group (group-file store
|
||
(list (user-group
|
||
(name "root")
|
||
(id 0))
|
||
(user-group
|
||
(name "users")
|
||
(id 100)
|
||
(members '("guest")))
|
||
(user-group
|
||
(name "guixbuild")
|
||
(id build-user-gid)
|
||
(members (map user-account-name
|
||
build-accounts))))))
|
||
(pam.d-drv (pam-services->directory store %pam-services))
|
||
(pam.d (derivation->output-path pam.d-drv))
|
||
|
||
(packages `(("coreutils" ,coreutils)
|
||
("bash" ,bash)
|
||
("guile" ,guile-2.0)
|
||
("dmd" ,dmd)
|
||
("gcc" ,gcc-final)
|
||
("libc" ,glibc-final)
|
||
("inetutils" ,inetutils)
|
||
("guix" ,guix-0.4)))
|
||
|
||
;; TODO: Replace with a real profile with a manifest.
|
||
;; TODO: Generate bashrc from packages' search-paths.
|
||
(profile-drv (union store packages
|
||
#:name "default-profile"))
|
||
(profile (derivation->output-path profile-drv))
|
||
(bashrc (add-text-to-store store "bashrc"
|
||
(string-append "
|
||
export PS1='\\u@\\h\\$ '
|
||
export PATH=$HOME/.guix-profile/bin:" profile "/bin:" profile "/sbin
|
||
export CPATH=$HOME/.guix-profile/include:" profile "/include
|
||
export LIBRARY_PATH=$HOME/.guix-profile/lib:" profile "/lib
|
||
alias ls='ls -p --color'
|
||
alias ll='ls -l'
|
||
")))
|
||
|
||
(issue (add-text-to-store store "issue" "
|
||
This is an alpha preview of the GNU system. Welcome.
|
||
|
||
This image features the GNU Guix package manager, which was used to
|
||
build it (http://www.gnu.org/software/guix/). The init system is
|
||
GNU dmd (http://www.gnu.org/software/dmd/).
|
||
|
||
You can log in as 'guest' or 'root' with no password.
|
||
"))
|
||
|
||
(populate `((directory "/nix/store" 0 ,build-user-gid)
|
||
(directory "/etc")
|
||
(directory "/var/log") ; for dmd
|
||
(directory "/var/run/nscd")
|
||
("/etc/shadow" -> ,shadow)
|
||
("/etc/passwd" -> ,passwd)
|
||
("/etc/group" -> ,group)
|
||
("/etc/login.defs" -> "/dev/null")
|
||
("/etc/pam.d" -> ,pam.d)
|
||
("/etc/resolv.conf" -> ,resolv.conf)
|
||
("/etc/profile" -> ,bashrc)
|
||
("/etc/issue" -> ,issue)
|
||
("/etc/services" -> ,etc-services)
|
||
("/etc/protocols" -> ,etc-protocols)
|
||
("/etc/rpc" -> ,etc-rpc)
|
||
(directory "/var/nix/gcroots")
|
||
("/var/nix/gcroots/default-profile" -> ,profile)
|
||
(directory "/tmp")
|
||
(directory "/var/nix/profiles/per-user/root" 0 0)
|
||
(directory "/var/nix/profiles/per-user/guest"
|
||
1000 100)
|
||
(directory "/home/guest" 1000 100)))
|
||
(out (derivation->output-path
|
||
(package-derivation store mingetty)))
|
||
(boot (add-text-to-store store "boot"
|
||
(object->string
|
||
`(execl ,dmd-file "dmd"
|
||
"--config" ,dmd-conf))
|
||
(list out)))
|
||
(entries (list (menu-entry
|
||
(label (string-append
|
||
"GNU System with Linux-Libre "
|
||
(package-version linux-libre)
|
||
" (technology preview)"))
|
||
(linux linux-libre)
|
||
(linux-arguments `("--root=/dev/vda1"
|
||
,(string-append "--load=" boot)))
|
||
(initrd gnu-system-initrd))))
|
||
(grub.cfg (grub-configuration-file store entries)))
|
||
(qemu-image store
|
||
#:grub-configuration grub.cfg
|
||
#:populate populate
|
||
#:disk-image-size (* 500 (expt 2 20))
|
||
#:initialize-store? #t
|
||
#:inputs-to-copy `(("boot" ,boot)
|
||
("linux" ,linux-libre)
|
||
("initrd" ,gnu-system-initrd)
|
||
("pam.d" ,pam.d-drv)
|
||
("profile" ,profile-drv)
|
||
|
||
;; Configuration.
|
||
("dmd.conf" ,dmd-conf)
|
||
("etc-pam.d" ,pam.d-drv)
|
||
("etc-passwd" ,passwd)
|
||
("etc-shadow" ,shadow)
|
||
("etc-group" ,group)
|
||
("etc-resolv.conf" ,resolv.conf)
|
||
("etc-bashrc" ,bashrc)
|
||
("etc-issue" ,issue)
|
||
("etc-motd" ,motd)
|
||
("net-base" ,net-base)
|
||
,@(append-map service-inputs
|
||
%dmd-services))))))
|
||
|
||
;;; vm.scm ends here
|